Localization　has　great　significance　for　theoretical　study　and　practical　applications　in　wireless　sensor　networks.　Meanwhile,　security　has　been　a　serious　issue　and　great　challenge　for　the　development　of　localization　technologies　since　attackers　can　alter　localization　information　to　affect　the　accuracy　of　localization　results.　In　this　paper,　we　propose　a　novel　secure　localization　scheme　based　on　signcryption　(SLBS)　that　will　allow　sensors　to　assure　the　confidentiality　and　integrity　of　their　location　information.　We　perform　analysis　to　explain　why　SLBS　can　enhance　the　security　and　accuracy　of　localization　through　the　signcryption　mechanism　and　simulation　to　verify　the　performance　of　SLBS.　The　analysis　and　simulation　serve　to　demonstrate　that　SLBS　can　effectively　reduce　localization　errors　in　hostile　environments　and　keep　the　distance　measurement　errors　within　a　small　range.